Gas engine



O. NELSN GAS ENGINE Filed March 16 1921 2 Shaats-Shaet l 4.....i'unlil@www Edy i@ Q. NELSON @As ENGINE 2 Sheetsheec 2 Filed March 16. 192103%@ /Ve/som ff/1 e f wim/w patented `luly l0, 1923. i

OTTO NELSON, OF CHICAGO, ILLIN e it known th zen of the United cago, inthe coun n 01s, ASSXGNOB OF ONE-FOURTH TO DAN'IEL I. TETE AND ONE-FOURTHT0 PETER LIGNELL, BOTH OF CHICAGO, ILLINGIS.

GAS ENGINE.

Application led March 16, 1921. Serial No. 452,677.

I, Or'ro NnLsoN, a citi- States,

ty of Cook andState of lh-nois, have invented certain new and usefulImprovements the following is a My invention r has for one of itssimple' and eflicie engines.

in Gas Engines, of which specification.

elates to gas engines and objects the provision of a nt timing means forgas A further object is the provision of means for drawing a full chargeto a point adjav cent the working of said cyhnden cylinder by meansoutside sti-ll further object is the provision of a simple and eiiicientmea-ns fonopening and closing the ports of a relations with eac Otherobjects w An embodiment of -tra-ted in the accom ing a part of twhichgas engine in definite h other. ill appear hereinafter.

my invention is illuspanying drawings, formhis specification, and inFig. 1 is a vertical section taken through an engine embodying Fig. 2 isa sect Fig. 1; and

Fig. 3 vis a looking from line eferring more ings, l have indic mountedon a cra working piston 7 der.

Mounted crank shaft 8 ani nected to the piston These parts may b myinvention; ion taken on line 2-2 of fragmental section taken as 3`3 inFig. 2.

particularly to the draw ated a working cylinder 5 nk` casing G andhaving a mounted in said cylinin the crank case is a..

.l the crank shaft is con- 7 by a connecting-link 9. e of ordinaryconstruction.

The upper part of the cylinder 5 may be provided with a.

water jacket 10 in the usual manner for radiating beat from saidcylinder in use. At tl .haver indicated a fadapted to functie At oneside of t 1e top of the cylinder 5 I spark plug 11 which is n in theordinary manner. `he cylinder I have indicated an intake valve cylinder12 and. an

exhaust valve cylinder 18.

These cylinders may be provided with a water jacket which may be acontinuation of water jacket. 10, or

cooled in any other desirable manner. cylinders 12 and 13 may be 'Theformed with removable tubes 14 which provides their inner surface orbores tubes 14 may be when so desired, or the dispensed with and theirresidingat Chi-L inner walls formed in any desirable manner. e provisionof the tubes 14 provides a simple and easy manner for making the ports.The port 15 `which communicates be tween the cylinder 5 and cylinders 12and 13 preferably extends entirely around the tubes 14, as clearlyindicated in F ig. 2, and said tubes are each provided with a pluralityof ports 16 which are arranged entirely around said tubes. This providesmeans whereby the Huid passing from intake cylinder 12 into lcylinder'may pass out through the ports 16 entirely around its tube 14 and thefluid passing from cylinder 5 into cylinder 13 can pass through all ofthe ports 16 into its tube 14:. I prefer to have the combined areas ofopenings 16 in each of the tubes lit substantially equal or slightlygreater than the cross area of said tube. This relation, however, may bechanged in accordance with any desired construction. llhe arrangement ofthe ports 16 entirely around the tubes 14 also facilitates cooling theadjacent parts of the cylinder walls.

Slidably mounted in cylinders 12and 13 are plungers 17 and 18. Theplungers 17 and 18 and piston 7 are each provided with the usual packingrings 19. A connecting rod 2O connects each of plungers 17 and 18 with:acrank or cam shaft 21, and the latter is connected by gears 22 and 23with crank shaft 8 in a relation so that, the crank shaft 8 makes tworevolutions to one revolution of the crankishaft 21'. The plungers 17and 18, connecting rods 20, and the cranks of crank shaft 21 arearranged so/as to properly time the engine. I preferably arrange thecranks on crank shaft 21 at substantially'() i'lcgrees apart. The axis24 ot' the connection between plunger 17 and its connecting rod 2O is*substantially directly over the axis of crank shaft 21 so that theintake port ofthe engine may be arranged to remain open during thedownward movement or suction stroke of the piston y7. The axis 25 of theconnection between plunger 18 and its connecting rod 20 is preferablyarranged to one side of a ,vertical line passing through the axis ofshaft 21 so that the exhaust port of the engine will be opened a longertime than the inta-ke port and near the end of the l speed, it isdesired the engine to run, the farther apart these lines `are, thetaeter the time or' the engine Will'be.

In the arrangement of the vparts as herein shown, the plunger 18 is in aposition where it begins-to uncover openings 16 in the. sleeve 14 of theexhaust valve cylinder in Fig. 1'. It will be noted that the piston 7 isnot quite to the end of its working stroke,l

as indicated b the osition of crank shaft .8 and a. direction infleeting arrow 26. The

' ""rcachcs e point 28 and then the intake POND v arrangement is suchthat during the continued movement of crank shaft 8 around through itsbottom deed center, end to its top dead center the crank shaft 21 willmove from the position shown to a point 27 when the plunger 18 will bebrought heck to the position shown in Fig., 1. 'lhis will permit theexhaust valve to be opened somewhat more Ithan one stroke of piston 7.The length of plunger 17 and its particuier relation to the crank shaft21 will cause it to beginv opening the intakeport when its crank willremain open While its crunk is pessing from point 28 to point 27, andduring this movement the crank 8 will be moved from its upper deedcenter to its lower dead center.

With the arrangement justset forth it will be apparent that the intakeplunger 17 wiil move from its position indicated in Fig.. 1 down to eposition where it begins to uncover ports 16 before the iston 7 beginsto drew uelinto the cylin er 5. ,This pro vides drawing fuel from thecerbureter to e positionvery close to the port 15 ready to be taken upby the suction of piston 7 in ycylinder 5 es soon. es the'inteke portisopen. .This constructionf, then provides means for bringing e chargeof fuel to the cylinder ready to hete-ken up .by the' letter as soon esthe intake port is open. The conical top portions of the plungers 17 end18 will help to direct the' fuel into the intake ports and inenten todirectthe dimherge gases from the 'exhaust ports to the center of thecylinder 13 4end then up out through exhaust pipe 29.

l cleimz 1. in en engine of the character described having e piston, ecrank shaft operatively connected yvith said piston, an intake cylinderund en exhaust cylinder connected with the'v Working cylinder of seidengine,V plunger.`

and out of elnement with the axis of auxiliary crank shaft.

In en en ine of the character described having an ex enst cylinder andanintake cylinder, e plun Jerfor seid intake cylinder,

y plunger for seid exhaust cylinder, e crnk mit, e connecting rodconnected to said ihteke plunger et e point adjacent the peripherythereof, and e connectingir'od connected with seid exhaust plunger'fata. point cidjacent the periphery thereosaid connccting rods each havingits 4lower end oonnccted with seid crank shaft, whereby the connectingrod for seid intake cylinder joins enid'inteke plunger at e point abovethel axis of. seid crank, end the connecting rod for seid exhaustcylinder joins seid exhaust plunger et 'e point out of elinement withseid crenk she-ft. c

ln testimony whereof l have signed my neme to this specification on this14th day of Merch, A. D. 1921.

o'r'ro NELSON.

